This author used the frame narrative of the friends Ottmar, Cyprian, and Sylvester telling and analyzing
 stories in a work that collected many of his miscellaneous writings and which shares its name with a Soviet
 literary group. He wrote about a student named Anselmus who falls in love with Serpentina while working
 for the Archivist after he was cursed by an evil apple monger. This author of "The Golden Pot" created the
 fictional alter-ego Johannes Kreisler and wrote a story in which Nathanael goes mad after learning that
 Olympia is an automaton. He wrote another story about Clara joining the title character to defeat the Mouse
 King. For 10 points, name this German author of the fantastical stories "The Sand Man" and "The
 Nutcracker and the Mouse King."
This author used the frame narrative of the friends Ottmar, Cyprian, and Sylvester telling and analyzing
 stories in a work that collected many of his miscellaneous writings and which shares its name with a Soviet
 literary group. He wrote about a student named Anselmus who falls in love with Serpentina while working
 for the Archivist after he was cursed by an evil apple monger. This author of "The Golden Pot" created the
 fictional alter-ego Johannes Kreisler and wrote a story in which Nathanael goes mad after learning that
 Olympia is an automaton. He wrote another story about Clara joining the title character to defeat the Mouse
 King. For 10 points, name this German author of the fantastical stories "The Sand Man" and "The
 Nutcracker and the Mouse King."
This author used the frame narrative of the friends Ottmar, Cyprian, and Sylvester telling and analyzing
 stories in a work that collected many of his miscellaneous writings and which shares its name with a Soviet
 literary group.
Ernst Theodor Wilhelm {Hoffmann} [or ETA {Hoffmann}]